A single phase full bridge diode rectifier is required to be designed for AC-DC rectification without transformer and energized from AC input of 230V 50Hz supply. without a filter capacitor. The load resistor is approximately 100 Ohm. The minimum PIV rating of each of the diodes would be:Select one:a. 650 Vb. 325 Vc. 200 Vd. 400 V
Question
A single phase full bridge diode rectifier is required to be designed for AC-DC rectification without transformer and energized from AC input of 230V 50Hz supply. without a filter capacitor. The load resistor is approximately 100 Ohm. The minimum PIV rating of each of the diodes would be:Select one:a. 650 Vb. 325 Vc. 200 Vd. 400 V
Solution
The Peak Inverse Voltage (PIV) or Peak Reverse Voltage (PRV) is the maximum voltage a diode can withstand in the reverse-biased direction before breakdown.
For a full-wave rectifier, the PIV is twice the peak value of the input voltage.
The peak value of an AC voltage is given by √2 * RMS value.
Given that the RMS value of the AC supply is 230V, the peak value will be √2 * 230V = 325V.
Therefore, the PIV of the diodes should be twice this value, i.e., 2 * 325V = 650V.
So, the correct answer is a. 650 V.
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